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LM4666 bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LM4666 bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 22 page LM4666, LM4666SDBD www.ti.com SNAS189A – MAY 2004 – REVISED MAY 2013 LM4666 Filterless High Efficiency Stereo 1.2W Switching Audio Amplifier Check for Samples: LM4666, LM4666SDBD 1 FEATURES DESCRIPTION The LM4666 is a fully integrated single-supply high 2 • No Output Filter Required for Inductive efficiency switching audio amplifier. It features an Transducers innovative modulator that eliminates the LC output • Selectable Gain of 6dB or 12dB filter used with typical switching amplifiers. • Very Fast Turn On Time: 6ms (typ) Eliminating the output filter reduces parts count, simplifies circuit design, and reduces board area. The • Minimum External Components LM4666 processes analog inputs with a delta-sigma • "Click and Pop" Suppression Circuitry modulation technique that lowers output noise and • Micro-Power Shutdown Mode THD when compared to conventional pulse width modulators. • Short Circuit Protection • Available in Space-Saving NHK0014A Package The LM4666 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 3V supply, it is APPLICATIONS capable of driving 8 Ω transducer loads at a • Mobile Phones continuous average output of 450mW with less than • PDAs 1%THD+N. Its flexible power supply requirements allow operation from 2.8V to 5.5V. • Portable Electronic Devices The LM4666 has high efficiency with an 8 Ω KEY SPECIFICATIONS transducer load compared to a typical Class AB amplifier. With a 3V supply, the IC's efficiency for a • Efficiency at 3V, 100mW into 8 Ω Transducer: 100mW power level is 79%, reaching 84% at 450mW 79% (typ) output power. • Efficiency at 3V, 450mW into 8 Ω Transducer: The LM4666 features a low-power consumption 84% (typ) shutdown mode. Shutdown may be enabled by • Efficiency at 5V, 1W into 8 Ω Transducer: 85% driving the Shutdown pin to a logic low (GND). (typ) The LM4666 has fixed selectable gain of either 6dB • Total Quiescent Power Supply Current: 7.0mA or 12dB. The LM4666 has short circuit protection (typ) against a short from the outputs to VDD or GND. • Total Shutdown Power Supply Current: 0.02µA (typ) • Single supply range: 2.8V to 5.5V 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Số phần tương tự - LM4666_15 |
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Mô tả tương tự - LM4666_15 |
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